Do I need an airport transit visa?

My nationality Obligation to hold a visa
Cameroon  No
Central African Republic   No
Equatorial Guinea  No

Other nationalities

For other nationalities, please refer to the list on the webpage of the State Secretariat for Migration (SEM). 

SEM – Visa Instructions – Annex 1, list 2 – Special Provisions regardless of nationality

If you are obliged to hold an airport transit visa (yes), please apply for it and refer to the information on the webpage:

Where to apply for an airport transit visa?

If you are not obliged to hold an airport transit visa (no/your country is not mentioned in the list on the SEM webpage), you are allowed to transit through Switzerland and stay in the airport international transit area without any visa.